A sample of 400 students at a certain university was taken after the midterm; 180 students reported staying up all night before the midterm and the other 220 students did not. Researchers recorded whether each student did well or poorly on the midterm. The following table contains the results.

	Did Well on Midterm	Did Poorly on Midterm
Stayed up all night	70	110
Did not stay up all night	160	60

Of those students who stayed up all night before the midterm, what percentage did well on the midterm?